[Qemu-devel] [QEMU] Windows 2000 image Startup Problems

[Qemu-devel] [QEMU] Windows 2000 image Startup Problems

[Massimo Callegari]

Hi, I'm facing a problem not yet fully documented or experienced in the
mailing lists I navigated 'till now, and, in any case, not really solved so
far, for what I know. Here is the description of the situation.

I installed a Windows 2000 Image with Qemu (0.6.0-3.1 and qemu-0.6.1-3.1
released via rpm package) under different Linux installations (a Suse PRO
9.2 distribution and a Fedora Core 2/3 versions).

The steps performed to obtain this are the following:

* Creation of a qcow image:

         $ qemu-img create -f img Win2000.img 10000M   or  $ qemu-mkcow
create Win2000.qcow 10G

* Copy of the installation CD of Windows 2000 on the local hard disk

         $ dd if=/dev/cdrom of=Win2000.iso

* Installation of Windows 2000 on the Qemu image:

         $ qemu -boot d -cdrom Win2000.iso -hda Win2000.qcow/img

The installation proceeeds without (almost) any problem and ends
successfully, but, when I try to load the newly created image ($ qemu
Win2000.qcow/img) the system boot ends up with an error message ("Booting
from Hard Disk ... Disk Read Error. Press CTRL+ALT+CANC to restart") like if
the mbr of the image were not present or if the partition table didn't
recognize a bootable sector on the "virtual" disk.

Notice that the problem doesn't appear 'till the boot of the system is based
on the cdrom-based install process as far as windows warm boots (in other
words the first time I face the problem is when I cold boot and start my
Windows 2000 image with the Qemu command "$ qemu Win2000.qcow/img". The same
doesn't happen if I rely on the newly made installation and on the related
command "$ qemu -boot d -cdrom Win2000.iso -hda Win2000.qcow/img". In that
case the error message is the one reported above).

I tried to boot the system from cdrom with "qemu -boot d -cdrom Win2000.iso
-hda Win2000.qcow/img" like during installation and in that case the error
message is the same.

I noticed that 'till now the only way to have a good bootable image is via
the creation of the Qemu image file with the qemu-mkcow command (for me it
was the only case in which it worked for the windows 2000 installation and
cold boot) on the Suse 9.2 installation with the qemu-0.6.0-3.1 rpm package
installed. All other tests failed.

Did anyone afford and solve this issue (apart from modifying by commenting
out line 1896 in hw/ide.c) ?

I think a definitive solution could made the Emulator more stable and
usable.

Thanks in advance for your cooperation.

Massimo

Re: [Qemu-devel] [QEMU] Windows 2000 image Startup Problems

[Struan Bartlett]

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Did you try the NT-BOOT-MAIN patch? (copy attached) It works for me 
routinely.

Incidentally, I don't recall where I found this - I can't see it in the 
dad-answers archive - but it would be good if someone put it there. 
Who's in charge of maintaining the patch archive?

Struan

Massimo Callegari wrote:

>Hi, I'm facing a problem not yet fully documented or experienced in the
>mailing lists I navigated 'till now, and, in any case, not really solved so
>far, for what I know. Here is the description of the situation.
>
>I installed a Windows 2000 Image with Qemu (0.6.0-3.1 and qemu-0.6.1-3.1
>released via rpm package) under different Linux installations (a Suse PRO
>9.2 distribution and a Fedora Core 2/3 versions).
>
>The steps performed to obtain this are the following:
>
>* Creation of a qcow image:
>
>         $ qemu-img create -f img Win2000.img 10000M   or  $ qemu-mkcow
>create Win2000.qcow 10G
>
>* Copy of the installation CD of Windows 2000 on the local hard disk
>
>         $ dd if=/dev/cdrom of=Win2000.iso
>
>* Installation of Windows 2000 on the Qemu image:
>
>         $ qemu -boot d -cdrom Win2000.iso -hda Win2000.qcow/img
>
>The installation proceeeds without (almost) any problem and ends
>successfully, but, when I try to load the newly created image ($ qemu
>Win2000.qcow/img) the system boot ends up with an error message ("Booting
>from Hard Disk ... Disk Read Error. Press CTRL+ALT+CANC to restart") like if
>the mbr of the image were not present or if the partition table didn't
>recognize a bootable sector on the "virtual" disk.
>
>Notice that the problem doesn't appear 'till the boot of the system is based
>on the cdrom-based install process as far as windows warm boots (in other
>words the first time I face the problem is when I cold boot and start my
>Windows 2000 image with the Qemu command "$ qemu Win2000.qcow/img". The same
>doesn't happen if I rely on the newly made installation and on the related
>command "$ qemu -boot d -cdrom Win2000.iso -hda Win2000.qcow/img". In that
>case the error message is the one reported above).
>
>I tried to boot the system from cdrom with "qemu -boot d -cdrom Win2000.iso
>-hda Win2000.qcow/img" like during installation and in that case the error
>message is the same.
>
>I noticed that 'till now the only way to have a good bootable image is via
>the creation of the Qemu image file with the qemu-mkcow command (for me it
>was the only case in which it worked for the windows 2000 installation and
>cold boot) on the Suse 9.2 installation with the qemu-0.6.0-3.1 rpm package
>installed. All other tests failed.
>
>Did anyone afford and solve this issue (apart from modifying by commenting
>out line 1896 in hw/ide.c) ?
>
>I think a definitive solution could made the Emulator more stable and
>usable.
>
>Thanks in advance for your cooperation.
>
>Massimo
>
>
>
>
>_______________________________________________
>Qemu-devel mailing list
>Qemu-devel@nongnu.org
>http://lists.nongnu.org/mailman/listinfo/qemu-devel
>  
>

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diff -rbu qemu.orig/hw/ide.c qemu/hw/ide.c
--- qemu.orig/hw/ide.c  2004-12-02 23:20:21.000000000 +0300
+++ qemu/hw/ide.c       2004-12-17 14:06:15.000000000 +0300
@@ -332,8 +332,12 @@
     uint8_t *data_ptr;
     uint8_t *data_end;
     uint8_t io_buffer[MAX_MULT_SECTORS*512 + 4];
+    int ide_set_irq_from_timer;
 } IDEState;
 
+volatile int ide_set_irq_from_timer;
+static IDEState *IDEStates[4];
+
 #define BM_STATUS_DMAING 0x01
 #define BM_STATUS_ERROR  0x02
 #define BM_STATUS_INT    0x04
@@ -512,6 +516,21 @@
     }
 }
 
+void make_ide_set_irq(void)
+{
+       int i;
+       IDEState *s;
+
+       ide_set_irq_from_timer--;
+       for(i = 0; (s=IDEStates[i]) != NULL; i++) {
+               if(s->ide_set_irq_from_timer) {
+                       s->ide_set_irq_from_timer--;
+                       ide_set_irq(s);
+                       break;
+               }
+       }
+}
+
 /* prepare data transfer and tell what to do after */
 static void ide_transfer_start(IDEState *s, uint8_t *buf, int size, 
                                EndTransferFunc *end_transfer_func)
@@ -667,7 +686,11 @@
         ide_transfer_start(s, s->io_buffer, 512 * n1, ide_sector_write);
     }
     ide_set_sector(s, sector_num + n);
+    if(s->ide_set_irq_from_timer) {
+       ide_set_irq_from_timer++;
+    } else {
     ide_set_irq(s);
+    }
 }
 
 static int ide_write_dma_cb(IDEState *s, 
@@ -1511,6 +1534,7 @@
             s->error = 0;
             s->status = SEEK_STAT | READY_STAT;
             s->req_nb_sectors = 1;
+           s->ide_set_irq_from_timer = 1;
             ide_transfer_start(s, s->io_buffer, 512, ide_sector_write);
             break;
         case WIN_MULTREAD:
@@ -1528,6 +1552,7 @@
             n = s->nsector;
             if (n > s->req_nb_sectors)
                 n = s->req_nb_sectors;
+           s->ide_set_irq_from_timer = 1;
             ide_transfer_start(s, s->io_buffer, 512 * n, ide_sector_write);
             break;
         case WIN_READDMA:
@@ -1883,6 +1908,7 @@
 
     for(i = 0; i < 2; i++) {
         s = ide_state + i;
+       IDEStates[drive_serial-1] = s;
         if (i == 0)
             s->bs = hd0;
         else
diff -rbu qemu.orig/vl.c qemu/vl.c
--- qemu.orig/vl.c      2004-12-13 01:20:04.000000000 +0300
+++ qemu/vl.c   2004-12-17 12:41:16.000000000 +0300
@@ -911,7 +911,7 @@
         
         /* timer signal */
         sigfillset(&act.sa_mask);
-        act.sa_flags = 0;
+       act.sa_flags = SA_RESTART;
 #if defined (TARGET_I386) && defined(USE_CODE_COPY)
         act.sa_flags |= SA_ONSTACK;
 #endif
@@ -2403,7 +2403,12 @@
     int n, max_size;
 #endif
     int ret;
+    /* ide.c hack */
+    extern volatile int ide_set_irq_from_timer;
+    extern void make_ide_set_irq(void);
 
+       if(ide_set_irq_from_timer)
+               make_ide_set_irq();
 #ifdef _WIN32
         if (timeout > 0)
             Sleep(timeout);
@@ -2449,8 +2454,6 @@
                             n = read(ioh->fd, buf, ioh->max_size);
                             if (n >= 0) {
                                 ioh->fd_read(ioh->opaque, buf, n);
-                            } else if (errno != EAGAIN) {
-                                ioh->fd_read(ioh->opaque, NULL, -errno);
                             }
                         }
                     }

Re: [Qemu-devel] [QEMU] Windows 2000 image Startup Problems

[Massimo Callegari]

> Did you try the NT-BOOT-MAIN patch? (copy attached) It works for me 
> routinely.

Thanks for your tip, but I have a further (maybe) silly question: stated
that the qemu version I mainly use is an rpm for qemu-0.6.1-3.1 on a Fedora
Core 2 installation, where should I find the qemu/hw/ide.c file ? I looked
for it over the whole filesystem without finding it.


Regards. Massimo

Re: [Qemu-devel] [QEMU] Windows 2000 image Startup Problems

[Struan Bartlett]

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Sounds like the problem is that your rpm is a pre-compiled binary of 
qemu, but to apply any patches what you need is the source code, maybe 
the nightly cvs snapshot from http://www.dad-answers.com/qemu/. After 
you get it, you need to untar it, apply any patches you need, and then 
compile it. That's not always simple but there's instructions in 
qemu-doc.html.

Alternatively, get a pre-compiled binary with the patches you need 
installed - if one exists. I don't know if it will work, but you could 
try removing your qemu rpm and instead downloading 
http://www.praguespringpeople.org/Struan/Software/QEMU/Builds/qemu-snapshot-2005-03-26_23-on-quit.tgz 
(which is the version I'm using). You would have to untar it and, inside 
the folder it extracts, run 'make install' (as root). You'd probably run 
into the ever-expanding filesystem problem if you're installing Windows 
2000 using it though.

Struan

Massimo Callegari wrote:

>>Did you try the NT-BOOT-MAIN patch? (copy attached) It works for me 
>>routinely.
>>    
>>
>
>Thanks for your tip, but I have a further (maybe) silly question: stated
>that the qemu version I mainly use is an rpm for qemu-0.6.1-3.1 on a Fedora
>Core 2 installation, where should I find the qemu/hw/ide.c file ? I looked
>for it over the whole filesystem without finding it.
>
>
>Regards. Massimo
>
>  
>

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